Chemistry
Which type of fumes are evolved when copper is added to acidified nitrates?
- NO2 fumes
- N2O fumes
- N2 fumes
- N2O3 fumes
Related Questions
An anode used during the extraction of aluminium is
- platinum rods
- carbon rods
- zinc sulphate
- copper sulphate
The molecular mass of CO2 and O2 are approximately 44 and 32 respectively. Which of the following statements regarding the mass of oxygen and number of molecules of oxygen is correct?
P. The mass of oxygen in 2.24 litres of CO2 is 3.2 g
Q. The number of molecules of oxygen present in it is 6.022 x 1023
- Only P
- Only Q
- Both P and Q
- Neither P nor Q
Match the following Column I with column II
Column I Column II (a) Vanadium pentaoxide 1. Preparation of a gas used in ripening of the fruits. (b) Acetic acid 2. Contains only ions (c) Calcium carbide 3. Low melting point (d) Dil. hydrochloric acid 4. Vinegar (e) Covalent compound 5. Sulphuric acid An element X belongs to group II A and another element Y belongs to group V A of the periodic table. Which of the following could be correct?
P. Valency of Y will be 5.
Q. Element X will have 2 valence electrons.
R. Element X belongs to group number 2
- Only P
- Q
- R
- Both Q and R